1、 Increase humidity

Reason: the growth environment of sunflower needs to maintain good air humidity. If the air is too dry and you don't pay attention to adding humidity, the leaves will be dry and yellow

Solution: spray water on the leaf surface and surrounding areas in time during the growth period, especially in dry winter. Pay more attention to water spraying and moisturizing, and improve the humidity through water evaporation

2、 Timely replenish water

Reason: the growth of sunflower needs an appropriate amount of water supply. If it is not watered for a long time, the roots will not be able to absorb water, and the plant leaves will naturally turn yellow

Solution: after feeling that the basin soil is dry and short of water, it needs to supplement water in time. It can be watered thoroughly at one time. After the root absorbs water, it can be supplied to the leaves

3、 Cut off rotten roots

Reason: too much watering and fertilization is also an important reason for the yellowing of leaves, which will make the roots unbearable, cause rotten roots, affect growth and lead to yellow leaves

Solution: cut off the rotten roots under the plants, re prepare the soil for planting after disinfection and sterilization, and pay attention to the application of water and fertilizer in the later stage

4、 The sun is strong

Reason: sunflower can't stand strong light, and it will burn and turn yellow after exposure

Solution: cut off the yellow leaves, then move them to a cool place and touch the soft astigmatism